The focus is mostly on the usual obvious "problem": boys and girls who grow up in single-sex environments and live in artificial communities and aren't allowed to be alone together or even touch don't have an easy time getting married by 22 or 23.
Those of you who did not grow up Orthodox will no doubt be thinking "22? 23? WTF? What's the rush?"
Well here's your answer, from an honest Orthodox woman:
When you don't get married young, you're likely to become less Orthodox. Uh, they will start experimenting with different things, they will start meeting different people, they will be influenced in negative ways... Uh, they will have different values, and they will not turn out to have a family life and be as Orthodox.
She's admitting that if you let these young adults, who have been sheltered from reality their entire lives, start to learn about themselves and the world, they're going to be less Orthodox. She doesn't see this as an indication that perhaps something is wrong with Orthodoxy, but just as a problem to be avoided by any means necessary.
Her solution is appalling. Get them married before they figure out who they are and what they want. Get them married before they start wondering if there's any truth to this religion they've been indoctrinated with since birth. Get them married before they have a chance to realize that what they've been taught about non-Jews and the non-Orthodox is not true. Get them married before they start having normal relationships and realizing maybe they don't want to be with a kollel learner or the rosh yeshiva's daughter.
It's possible that she believes that if they do get married young, they'll live happily ever after as Orthodox people. But it's also possible that she simply realizes that once they get married, it's too late. Once a person realizes that they don't want to be Orthodox anymore, they can't leave unless their spouse is on board. (This happens -- Hi Avi! -- but based on what I see in the Jblogosphere, doesn't happen as often as one spouse having to keep his/her beliefs secret so as to not lose their marriage and possibly kids.)
This is just bad parenting (by the parents and by the community, in loco parentis.) It's control-freak parenting. You want your kid to turn out exactly one way, so you hide from him all other ways and then trap him with marriage before he figures it out. It's wrong and it's unhealthy.
It's not even good religion -- what kind of religious people are you raising who are religious just because they never really had a choice?
What people should do -- what good parents everywhere do -- is raise their children to make informed decisions. Teach them your values, give them the wisdom you've accumulated, but then let them grow into the adults they are rather than the adults you wanted them to be. Children -- especially adult children -- are not your personal playthings.
If you want your child to become a doctor but he's a gifted artist, do you forbid him from lifting a paintbrush? Do you set up an entire community so that he can live his life without ever having a genuine conversation with a non-doctor? Do you force him to study premed and then enroll in medical school? Do you then take out the loans in his name so that he's stuck with a $200,000 debt he can only repay by becoming a doctor? And then make sure he marries a woman who will only stay with a doctor?
You do if you're a control-freak parent. If you're a good parent, you explain to your child why you think being a doctor would be good for him, and you share your concerns about living as a professional artist, but ultimately, you recognize that it's his life and if he doesn't want to be a doctor, it's probably not a good idea to manipulate him into becoming one anyway.